Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

The Ibirapuera Auditorium (Portuguese: Auditorio Ibirapuera) is a building conceived by Oscar Niemeyer for the presentation of musical spectacles, situated in Ibirapuera Park in Sao Paulo.
Which architect was responsible for Ibirapuera Auditorium?